Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Pensões estatais de 7%, e um autônomo de 7%, e outras fontes de renda de 2% têm qual renda de investimento?
 ###Tabelas: CREATE TABLE most_watched_programmes (most_watched_programmes_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Show VARCHAR, Episode VARCHAR, Number of Viewers INT, Date VARCHAR) CREATE TABLE sources_of_income (sources_of_income_id AUTO_INCREMENT PRIMARY KEY, Region VARCHAR, Employment ( salaries & wages) VARCHAR, Self employed VARCHAR, Investment income VARCHAR, Working tax credit VARCHAR, State pensions VARCHAR, Occupational pensions VARCHAR, Disability benefits VARCHAR, Other social security benefits VARCHAR, Other income sources VARCHAR) CREATE TABLE semifinal_2 (semifinal_2_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Lane INT, Name VARCHAR, Nationality VARCHAR, Time VARCHAR) CREATE TABLE list_of_boxing_septuple_or_seven_division_champions_—_major_titles (list_of_boxing_septuple_or_seven_division_champions_—_major_titles_id AUTO_INCREMENT PRIMARY KEY, Number INT, Name VARCHAR, Titles VARCHAR, Date VARCHAR, Opponent VARCHAR, Result VARCHAR, Defenses INT) CREATE TABLE incorporated_places_with_a_density_of_over_10000_people_per_square_mile (incorporated_places_with_a_density_of_over_10000_people_per_square_mile_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Incorporated place VARCHAR, Metropolitan area VARCHAR, State VARCHAR, Population (2010 census) INT, Land area (mi 2 ) VARCHAR, Population density (people per mi 2 ) VARCHAR)  
SELECT Investment income FROM sources_of_income WHERE State pensions = 7% AND Self employed = 7% AND Other income sources = 2%